Efficacy of Some Plant Extracts on Anopheles Gambiae Mosquito Larvae : Botanicals for Mosquito Control

Efficacies of both the ethanolic and aqueous extracts of Calotropis gigantea, R. Br. (Ascelepiadaceae), Physalis angulata L., Aframomum melegueta K. Schum, Piper guineense Schum & Thonn, Delonix regia (Bojer ex Hook.) Raf., Xylopia aethiopica (Dunal) A. Rich, Blighia sapida Koeing, Tetrapluera tetraptera, Jatropha curcas Linn. and Raphia vinifera were tested on second instar larvae of Anopheles mosquito for 24hours. The LC50 and LC95 conducted showed that the ethanolic extracts of P. guineense seeds emerged the most active with 0.028mg/ml while the aqueous extracts of D. regia (20mg/ml) seeds, J. curcas (18.25mg/ml) seeds and R. vinifera (